human-alien encounter

"Sometimes weird things happen to people. Ask Jake. He could tell you about the night he and his friends saw a strange light in the sky that seemed to be heading right for them. That was the night five normal kids learned that humanity is under a silent attack--and were given the power to fight back. Now Jake, Rachel, Cassie, Tobias, and Marco can transform into some of the most dangerous creatures on Earth. And they must use that power to outsmart an evil greater than anything the world has ever seen"--Provided by publisher.

Dash, Carly, Gabriel, and Piper visit a planet made up of molten lava and run entirely by robots where they must find the second element of the Source that will save the Earth.

After the Hoots invade Earth and turn humans into Mounts, Charley's father and others who have not been changed, plan to rise up against the Hoots and take the world back.